I would recommend trying Seachem's Matrix Bio Media in the extra media slots of your filters as well as Purigen. The Purigen I place in the same slots as the filter floss. Also, how much are you feeding?
Ok I'll see if I can find it here in my area. I had also considered Algone if anyone has ever used it. Saw an ad in Aquarium Fish Magazine and also at Big Al's. As for feeding, I give a couple of sprinkles in the mornings and night of Bio-blend tropical and 2 disks of Bio-blend bottom feeder with a pinch of Tetra-min Pro. I'm probably over-feeding.
Overfeeding can cause cloudines. Give the tank a good gravel cleaning and try feeding about half what you do now and see what happens. We always used to say at the fish store 'a hungry fish is a healthy fish'.